The theory I believe is true, is the warrior theory. Why I believe this is due to all the evidence of his village being attacked. There are traces on his teeth that show he traveled only 60 km away from his home, which means he lived in a village. Times in the Neolithic Period were violent and there were fights for land. Otzi's village was invaded because of this, Otzi also had a copper axe which was precious at the time. There is also different types of blood on Otzi, meaning that there wasn't just one other person there but many.